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Why is the heart actually stopped when the defibrillator pads are applied?
Defibrillation depolarizes all of the heart tissue at once. This usually will terminate abnormal heart rhythms with the hope that a normal one will take over.
A quivering or spontaneous muscle contraction of the heart is called?
fibrillation
Is the heart in the epigastric region?
The heart is located in the epigastric region. More specifically, it is located in the mediastinum, which is in the epigastric region.
What term best describes the region between the lungs that contains the heart?
Pericardial region, or the mediastinum.
What is the central thoracic region that contains the heart?
The heart is a thoracic, not abdominal, organ. It is found in the mediastinum.
What region in the heart depolarizes spontaneously?
the SA Node
The SA node is the normal pacemaker of the heart because the SA node?
depolarizes to its threshold potential before other pacemakers in the heart
Why is the heart actually stopped when the defibrillator pads are applied?
Defibrillation depolarizes all of the heart tissue at once. This usually will terminate abnormal heart rhythms with the hope that a normal one will take over.
The SA node depolarizes more frequently under the influence of?
The SA node depolarizes more frequently under the influence of the sympathetic nervous system. This is due to the release of norepinephrine, which binds to beta-adrenergic receptors in the SA node, leading to an increase in heart rate.
A quivering or spontaneous muscle contraction of the heart is called?
fibrillation
Spontaneous developing local potential in heart?
pacemaker potential
Quivering or spontaneous muscle contractions especially of the heart is called?
fibrillation
When a neuron depolarizes this runs out of the axon?
Potassium.
Do you smile from the heart (center)?
This would depend upon if the smile was spontaneous or intentional.
Is the heart in the epigastric region?
The heart is located in the epigastric region. More specifically, it is located in the mediastinum, which is in the epigastric region.
What region is heart located?
Epigastric region
If a neurotransmitter depolarizes the postsynaptic membrane it is referred to as?
Excitatory neurotransmitter.
